001 /*
002 * Copyright 2000-2005 Sun Microsystems, Inc. All Rights Reserved.
003 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
004 *
005 * This code is free software; you can redistribute it and/or modify it
006 * under the terms of the GNU General Public License version 2 only, as
007 * published by the Free Software Foundation. Sun designates this
008 * particular file as subject to the "Classpath" exception as provided
009 * by Sun in the LICENSE file that accompanied this code.
010 *
011 * This code is distributed in the hope that it will be useful, but WITHOUT
012 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
013 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
014 * version 2 for more details (a copy is included in the LICENSE file that
015 * accompanied this code).
016 *
017 * You should have received a copy of the GNU General Public License version
018 * 2 along with this work; if not, write to the Free Software Foundation,
019 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
020 *
021 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
022 * CA 95054 USA or visit www.sun.com if you need additional information or
023 * have any questions.
024 */
025
026 package java.util;
027
028 import java.io.BufferedInputStream;
029 import java.io.DataInputStream;
030 import java.io.File;
031 import java.io.FileInputStream;
032 import java.io.FileReader;
033 import java.io.IOException;
034 import java.io.Serializable;
035 import java.security.AccessController;
036 import java.security.PrivilegedAction;
037 import java.util.logging.Level;
038 import java.util.logging.Logger;
039 import java.util.regex.Pattern;
040 import java.util.regex.Matcher;
041 import java.util.spi.CurrencyNameProvider;
042 import java.util.spi.LocaleServiceProvider;
043 import sun.util.LocaleServiceProviderPool;
044 import sun.util.resources.LocaleData;
045 import sun.util.resources.OpenListResourceBundle;
046
047 /**
048 * Represents a currency. Currencies are identified by their ISO 4217 currency
049 * codes. Visit the <a href="http://www.bsi-global.com/">
050 * BSi web site</a> for more information, including a table of
051 * currency codes.
052 * <p>
053 * The class is designed so that there's never more than one
054 * <code>Currency</code> instance for any given currency. Therefore, there's
055 * no public constructor. You obtain a <code>Currency</code> instance using
056 * the <code>getInstance</code> methods.
057 * <p>
058 * Users can supersede the Java runtime currency data by creating a properties
059 * file named <code><JAVA_HOME>/lib/currency.properties</code>. The contents
060 * of the properties file are key/value pairs of the ISO 3166 country codes
061 * and the ISO 4217 currency data respectively. The value part consists of
062 * three ISO 4217 values of a currency, i.e., an alphabetic code, a numeric
063 * code, and a minor unit. Those three ISO 4217 values are separated by commas.
064 * The lines which start with '#'s are considered comment lines. For example,
065 * <p>
066 * <code>
067 * #Sample currency properties<br>
068 * JP=JPZ,999,0
069 * </code>
070 * <p>
071 * will supersede the currency data for Japan.
072 *
073 * @since 1.4
074 */
075 public final class Currency implements Serializable {
076
077 private static final long serialVersionUID = -158308464356906721L;
078
079 /**
080 * ISO 4217 currency code for this currency.
081 *
082 * @serial
083 */
084 private final String currencyCode;
085
086 /**
087 * Default fraction digits for this currency.
088 * Set from currency data tables.
089 */
090 transient private final int defaultFractionDigits;
091
092 /**
093 * ISO 4217 numeric code for this currency.
094 * Set from currency data tables.
095 */
096 transient private final int numericCode;
097
098 // class data: instance map
099
100 private static HashMap<String, Currency> instances = new HashMap<String, Currency>(
101 7);
102 private static HashSet<Currency> available;
103
104 // Class data: currency data obtained from currency.data file.
105 // Purpose:
106 // - determine valid country codes
107 // - determine valid currency codes
108 // - map country codes to currency codes
109 // - obtain default fraction digits for currency codes
110 //
111 // sc = special case; dfd = default fraction digits
112 // Simple countries are those where the country code is a prefix of the
113 // currency code, and there are no known plans to change the currency.
114 //
115 // table formats:
116 // - mainTable:
117 // - maps country code to 32-bit int
118 // - 26*26 entries, corresponding to [A-Z]*[A-Z]
119 // - \u007F -> not valid country
120 // - bits 18-31: unused
121 // - bits 8-17: numeric code (0 to 1023)
122 // - bit 7: 1 - special case, bits 0-4 indicate which one
123 // 0 - simple country, bits 0-4 indicate final char of currency code
124 // - bits 5-6: fraction digits for simple countries, 0 for special cases
125 // - bits 0-4: final char for currency code for simple country, or ID of special case
126 // - special case IDs:
127 // - 0: country has no currency
128 // - other: index into sc* arrays + 1
129 // - scCutOverTimes: cut-over time in millis as returned by
130 // System.currentTimeMillis for special case countries that are changing
131 // currencies; Long.MAX_VALUE for countries that are not changing currencies
132 // - scOldCurrencies: old currencies for special case countries
133 // - scNewCurrencies: new currencies for special case countries that are
134 // changing currencies; null for others
135 // - scOldCurrenciesDFD: default fraction digits for old currencies
136 // - scNewCurrenciesDFD: default fraction digits for new currencies, 0 for
137 // countries that are not changing currencies
138 // - otherCurrencies: concatenation of all currency codes that are not the
139 // main currency of a simple country, separated by "-"
140 // - otherCurrenciesDFD: decimal format digits for currencies in otherCurrencies, same order
141
142 static int formatVersion;
143 static int dataVersion;
144 static int[] mainTable;
145 static long[] scCutOverTimes;
146 static String[] scOldCurrencies;
147 static String[] scNewCurrencies;
148 static int[] scOldCurrenciesDFD;
149 static int[] scNewCurrenciesDFD;
150 static int[] scOldCurrenciesNumericCode;
151 static int[] scNewCurrenciesNumericCode;
152 static String otherCurrencies;
153 static int[] otherCurrenciesDFD;
154 static int[] otherCurrenciesNumericCode;
155
156 // handy constants - must match definitions in GenerateCurrencyData
157 // magic number
158 private static final int MAGIC_NUMBER = 0x43757244;
159 // number of characters from A to Z
160 private static final int A_TO_Z = ('Z' - 'A') + 1;
161 // entry for invalid country codes
162 private static final int INVALID_COUNTRY_ENTRY = 0x007F;
163 // entry for countries without currency
164 private static final int COUNTRY_WITHOUT_CURRENCY_ENTRY = 0x0080;
165 // mask for simple case country entries
166 private static final int SIMPLE_CASE_COUNTRY_MASK = 0x0000;
167 // mask for simple case country entry final character
168 private static final int SIMPLE_CASE_COUNTRY_FINAL_CHAR_MASK = 0x001F;
169 // mask for simple case country entry default currency digits
170 private static final int SIMPLE_CASE_COUNTRY_DEFAULT_DIGITS_MASK = 0x0060;
171 // shift count for simple case country entry default currency digits
172 private static final int SIMPLE_CASE_COUNTRY_DEFAULT_DIGITS_SHIFT = 5;
173 // mask for special case country entries
174 private static final int SPECIAL_CASE_COUNTRY_MASK = 0x0080;
175 // mask for special case country index
176 private static final int SPECIAL_CASE_COUNTRY_INDEX_MASK = 0x001F;
177 // delta from entry index component in main table to index into special case tables
178 private static final int SPECIAL_CASE_COUNTRY_INDEX_DELTA = 1;
179 // mask for distinguishing simple and special case countries
180 private static final int COUNTRY_TYPE_MASK = SIMPLE_CASE_COUNTRY_MASK
181 | SPECIAL_CASE_COUNTRY_MASK;
182 // mask for the numeric code of the currency
183 private static final int NUMERIC_CODE_MASK = 0x0003FF00;
184 // shift count for the numeric code of the currency
185 private static final int NUMERIC_CODE_SHIFT = 8;
186
187 // Currency data format version
188 private static final int VALID_FORMAT_VERSION = 1;
189
190 static {
191 AccessController.doPrivileged(new PrivilegedAction() {
192 public Object run() {
193 String homeDir = System.getProperty("java.home");
194 try {
195 String dataFile = homeDir + File.separator + "lib"
196 + File.separator + "currency.data";
197 DataInputStream dis = new DataInputStream(
198 new BufferedInputStream(
199 new FileInputStream(dataFile)));
200 if (dis.readInt() != MAGIC_NUMBER) {
201 throw new InternalError(
202 "Currency data is possibly corrupted");
203 }
204 formatVersion = dis.readInt();
205 if (formatVersion != VALID_FORMAT_VERSION) {
206 throw new InternalError(
207 "Currency data format is incorrect");
208 }
209 dataVersion = dis.readInt();
210 mainTable = readIntArray(dis, A_TO_Z * A_TO_Z);
211 int scCount = dis.readInt();
212 scCutOverTimes = readLongArray(dis, scCount);
213 scOldCurrencies = readStringArray(dis, scCount);
214 scNewCurrencies = readStringArray(dis, scCount);
215 scOldCurrenciesDFD = readIntArray(dis, scCount);
216 scNewCurrenciesDFD = readIntArray(dis, scCount);
217 scOldCurrenciesNumericCode = readIntArray(dis,
218 scCount);
219 scNewCurrenciesNumericCode = readIntArray(dis,
220 scCount);
221 int ocCount = dis.readInt();
222 otherCurrencies = dis.readUTF();
223 otherCurrenciesDFD = readIntArray(dis, ocCount);
224 otherCurrenciesNumericCode = readIntArray(dis,
225 ocCount);
226 dis.close();
227 } catch (IOException e) {
228 InternalError ie = new InternalError();
229 ie.initCause(e);
230 throw ie;
231 }
232
233 // look for the properties file for overrides
234 try {
235 File propFile = new File(homeDir + File.separator
236 + "lib" + File.separator
237 + "currency.properties");
238 if (propFile.exists()) {
239 Properties props = new Properties();
240 props.load(new FileReader(propFile));
241 Set<String> keys = props.stringPropertyNames();
242 Pattern propertiesPattern = Pattern
243 .compile("([A-Z]{3})\\s*,\\s*(\\d{3})\\s*,\\s*([0-3])");
244 for (String key : keys) {
245 replaceCurrencyData(propertiesPattern, key
246 .toUpperCase(Locale.ROOT), props
247 .getProperty(key).toUpperCase(
248 Locale.ROOT));
249 }
250 }
251 } catch (IOException e) {
252 log(
253 Level.INFO,
254 "currency.properties is ignored because of an IOException",
255 e);
256 }
257 return null;
258 }
259 });
260 }
261
262 /**
263 * Constants for retrieving localized names from the name providers.
264 */
265 private static final int SYMBOL = 0;
266 private static final int DISPLAYNAME = 1;
267
268 /**
269 * Constructs a <code>Currency</code> instance. The constructor is private
270 * so that we can insure that there's never more than one instance for a
271 * given currency.
272 */
273 private Currency(String currencyCode, int defaultFractionDigits,
274 int numericCode) {
275 this .currencyCode = currencyCode;
276 this .defaultFractionDigits = defaultFractionDigits;
277 this .numericCode = numericCode;
278 }
279
280 /**
281 * Returns the <code>Currency</code> instance for the given currency code.
282 *
283 * @param currencyCode the ISO 4217 code of the currency
284 * @return the <code>Currency</code> instance for the given currency code
285 * @exception NullPointerException if <code>currencyCode</code> is null
286 * @exception IllegalArgumentException if <code>currencyCode</code> is not
287 * a supported ISO 4217 code.
288 */
289 public static Currency getInstance(String currencyCode) {
290 return getInstance(currencyCode, Integer.MIN_VALUE, 0);
291 }
292
293 private static Currency getInstance(String currencyCode,
294 int defaultFractionDigits, int numericCode) {
295 synchronized (instances) {
296 // Try to look up the currency code in the instances table.
297 // This does the null pointer check as a side effect.
298 // Also, if there already is an entry, the currencyCode must be valid.
299 Currency instance = instances.get(currencyCode);
300 if (instance != null) {
301 return instance;
302 }
303
304 if (defaultFractionDigits == Integer.MIN_VALUE) {
305 // Currency code not internally generated, need to verify first
306 // A currency code must have 3 characters and exist in the main table
307 // or in the list of other currencies.
308 if (currencyCode.length() != 3) {
309 throw new IllegalArgumentException();
310 }
311 char char1 = currencyCode.charAt(0);
312 char char2 = currencyCode.charAt(1);
313 int tableEntry = getMainTableEntry(char1, char2);
314 if ((tableEntry & COUNTRY_TYPE_MASK) == SIMPLE_CASE_COUNTRY_MASK
315 && tableEntry != INVALID_COUNTRY_ENTRY
316 && currencyCode.charAt(2) - 'A' == (tableEntry & SIMPLE_CASE_COUNTRY_FINAL_CHAR_MASK)) {
317 defaultFractionDigits = (tableEntry & SIMPLE_CASE_COUNTRY_DEFAULT_DIGITS_MASK) >> SIMPLE_CASE_COUNTRY_DEFAULT_DIGITS_SHIFT;
318 numericCode = (tableEntry & NUMERIC_CODE_MASK) >> NUMERIC_CODE_SHIFT;
319 } else {
320 // Check for '-' separately so we don't get false hits in the table.
321 if (currencyCode.charAt(2) == '-') {
322 throw new IllegalArgumentException();
323 }
324 int index = otherCurrencies.indexOf(currencyCode);
325 if (index == -1) {
326 throw new IllegalArgumentException();
327 }
328 defaultFractionDigits = otherCurrenciesDFD[index / 4];
329 numericCode = otherCurrenciesNumericCode[index / 4];
330 }
331 }
332
333 instance = new Currency(currencyCode,
334 defaultFractionDigits, numericCode);
335 instances.put(currencyCode, instance);
336 return instance;
337 }
338 }
339
340 /**
341 * Returns the <code>Currency</code> instance for the country of the
342 * given locale. The language and variant components of the locale
343 * are ignored. The result may vary over time, as countries change their
344 * currencies. For example, for the original member countries of the
345 * European Monetary Union, the method returns the old national currencies
346 * until December 31, 2001, and the Euro from January 1, 2002, local time
347 * of the respective countries.
348 * <p>
349 * The method returns <code>null</code> for territories that don't
350 * have a currency, such as Antarctica.
351 *
352 * @param locale the locale for whose country a <code>Currency</code>
353 * instance is needed
354 * @return the <code>Currency</code> instance for the country of the given
355 * locale, or null
356 * @exception NullPointerException if <code>locale</code> or its country
357 * code is null
358 * @exception IllegalArgumentException if the country of the given locale
359 * is not a supported ISO 3166 country code.
360 */
361 public static Currency getInstance(Locale locale) {
362 String country = locale.getCountry();
363 if (country == null) {
364 throw new NullPointerException();
365 }
366
367 if (country.length() != 2) {
368 throw new IllegalArgumentException();
369 }
370
371 char char1 = country.charAt(0);
372 char char2 = country.charAt(1);
373 int tableEntry = getMainTableEntry(char1, char2);
374 if ((tableEntry & COUNTRY_TYPE_MASK) == SIMPLE_CASE_COUNTRY_MASK
375 && tableEntry != INVALID_COUNTRY_ENTRY) {
376 char finalChar = (char) ((tableEntry & SIMPLE_CASE_COUNTRY_FINAL_CHAR_MASK) + 'A');
377 int defaultFractionDigits = (tableEntry & SIMPLE_CASE_COUNTRY_DEFAULT_DIGITS_MASK) >> SIMPLE_CASE_COUNTRY_DEFAULT_DIGITS_SHIFT;
378 int numericCode = (tableEntry & NUMERIC_CODE_MASK) >> NUMERIC_CODE_SHIFT;
379 StringBuffer sb = new StringBuffer(country);
380 sb.append(finalChar);
381 return getInstance(sb.toString(), defaultFractionDigits,
382 numericCode);
383 } else {
384 // special cases
385 if (tableEntry == INVALID_COUNTRY_ENTRY) {
386 throw new IllegalArgumentException();
387 }
388 if (tableEntry == COUNTRY_WITHOUT_CURRENCY_ENTRY) {
389 return null;
390 } else {
391 int index = (tableEntry & SPECIAL_CASE_COUNTRY_INDEX_MASK)
392 - SPECIAL_CASE_COUNTRY_INDEX_DELTA;
393 if (scCutOverTimes[index] == Long.MAX_VALUE
394 || System.currentTimeMillis() < scCutOverTimes[index]) {
395 return getInstance(scOldCurrencies[index],
396 scOldCurrenciesDFD[index],
397 scOldCurrenciesNumericCode[index]);
398 } else {
399 return getInstance(scNewCurrencies[index],
400 scNewCurrenciesDFD[index],
401 scNewCurrenciesNumericCode[index]);
402 }
403 }
404 }
405 }
406
407 /**
408 * Gets the set of available currencies. The returned set of currencies
409 * contains all of the available currencies, which may include currencies
410 * that represent obsolete ISO 4217 codes. The set can be modified
411 * without affecting the available currencies in the runtime.
412 *
413 * @return the set of available currencies. If there is no currency
414 * available in the runtime, the returned set is empty.
415 * @since 1.7
416 */
417 public static Set<Currency> getAvailableCurrencies() {
418 synchronized (Currency.class) {
419 if (available == null) {
420 available = new HashSet<Currency>(256);
421
422 // Add simple currencies first
423 for (char c1 = 'A'; c1 <= 'Z'; c1++) {
424 for (char c2 = 'A'; c2 <= 'Z'; c2++) {
425 int tableEntry = getMainTableEntry(c1, c2);
426 if ((tableEntry & COUNTRY_TYPE_MASK) == SIMPLE_CASE_COUNTRY_MASK
427 && tableEntry != INVALID_COUNTRY_ENTRY) {
428 char finalChar = (char) ((tableEntry & SIMPLE_CASE_COUNTRY_FINAL_CHAR_MASK) + 'A');
429 int defaultFractionDigits = (tableEntry & SIMPLE_CASE_COUNTRY_DEFAULT_DIGITS_MASK) >> SIMPLE_CASE_COUNTRY_DEFAULT_DIGITS_SHIFT;
430 int numericCode = (tableEntry & NUMERIC_CODE_MASK) >> NUMERIC_CODE_SHIFT;
431 StringBuilder sb = new StringBuilder();
432 sb.append(c1);
433 sb.append(c2);
434 sb.append(finalChar);
435 available
436 .add(getInstance(sb.toString(),
437 defaultFractionDigits,
438 numericCode));
439 }
440 }
441 }
442
443 // Now add other currencies
444 StringTokenizer st = new StringTokenizer(
445 otherCurrencies, "-");
446 while (st.hasMoreElements()) {
447 available
448 .add(getInstance((String) st.nextElement()));
449 }
450 }
451 }
452
453 return (Set<Currency>) available.clone();
454 }
455
456 /**
457 * Gets the ISO 4217 currency code of this currency.
458 *
459 * @return the ISO 4217 currency code of this currency.
460 */
461 public String getCurrencyCode() {
462 return currencyCode;
463 }
464
465 /**
466 * Gets the symbol of this currency for the default locale.
467 * For example, for the US Dollar, the symbol is "$" if the default
468 * locale is the US, while for other locales it may be "US$". If no
469 * symbol can be determined, the ISO 4217 currency code is returned.
470 *
471 * @return the symbol of this currency for the default locale
472 */
473 public String getSymbol() {
474 return getSymbol(Locale.getDefault());
475 }
476
477 /**
478 * Gets the symbol of this currency for the specified locale.
479 * For example, for the US Dollar, the symbol is "$" if the specified
480 * locale is the US, while for other locales it may be "US$". If no
481 * symbol can be determined, the ISO 4217 currency code is returned.
482 *
483 * @param locale the locale for which a display name for this currency is
484 * needed
485 * @return the symbol of this currency for the specified locale
486 * @exception NullPointerException if <code>locale</code> is null
487 */
488 public String getSymbol(Locale locale) {
489 try {
490 // Check whether a provider can provide an implementation that's closer
491 // to the requested locale than what the Java runtime itself can provide.
492 LocaleServiceProviderPool pool = LocaleServiceProviderPool
493 .getPool(CurrencyNameProvider.class);
494
495 if (pool.hasProviders()) {
496 // Assuming that all the country locales include necessary currency
497 // symbols in the Java runtime's resources, so there is no need to
498 // examine whether Java runtime's currency resource bundle is missing
499 // names. Therefore, no resource bundle is provided for calling this
500 // method.
501 String symbol = pool.getLocalizedObject(
502 CurrencyNameGetter.INSTANCE, locale,
503 (OpenListResourceBundle) null, currencyCode,
504 SYMBOL);
505 if (symbol != null) {
506 return symbol;
507 }
508 }
509
510 ResourceBundle bundle = LocaleData.getCurrencyNames(locale);
511 return bundle.getString(currencyCode);
512 } catch (MissingResourceException e) {
513 // use currency code as symbol of last resort
514 return currencyCode;
515 }
516 }
517
518 /**
519 * Gets the default number of fraction digits used with this currency.
520 * For example, the default number of fraction digits for the Euro is 2,
521 * while for the Japanese Yen it's 0.
522 * In the case of pseudo-currencies, such as IMF Special Drawing Rights,
523 * -1 is returned.
524 *
525 * @return the default number of fraction digits used with this currency
526 */
527 public int getDefaultFractionDigits() {
528 return defaultFractionDigits;
529 }
530
531 /**
532 * Returns the ISO 4217 numeric code of this currency.
533 *
534 * @return the ISO 4217 numeric code of this currency
535 * @since 1.7
536 */
537 public int getNumericCode() {
538 return numericCode;
539 }
540
541 /**
542 * Gets the name that is suitable for displaying this currency for
543 * the default locale. If there is no suitable display name found
544 * for the default locale, the ISO 4217 currency code is returned.
545 *
546 * @return the display name of this currency for the default locale
547 * @since 1.7
548 */
549 public String getDisplayName() {
550 return getDisplayName(Locale.getDefault());
551 }
552
553 /**
554 * Gets the name that is suitable for displaying this currency for
555 * the specified locale. If there is no suitable display name found
556 * for the specified locale, the ISO 4217 currency code is returned.
557 *
558 * @param locale the locale for which a display name for this currency is
559 * needed
560 * @return the display name of this currency for the specified locale
561 * @exception NullPointerException if <code>locale</code> is null
562 * @since 1.7
563 */
564 public String getDisplayName(Locale locale) {
565 try {
566 OpenListResourceBundle bundle = LocaleData
567 .getCurrencyNames(locale);
568 String result = null;
569 String bundleKey = currencyCode.toLowerCase(Locale.ROOT);
570
571 // Check whether a provider can provide an implementation that's closer
572 // to the requested locale than what the Java runtime itself can provide.
573 LocaleServiceProviderPool pool = LocaleServiceProviderPool
574 .getPool(CurrencyNameProvider.class);
575 if (pool.hasProviders()) {
576 result = pool.getLocalizedObject(
577 CurrencyNameGetter.INSTANCE, locale, bundleKey,
578 bundle, currencyCode, DISPLAYNAME);
579 }
580
581 if (result == null) {
582 result = bundle.getString(bundleKey);
583 }
584
585 if (result != null) {
586 return result;
587 }
588 } catch (MissingResourceException e) {
589 // fall through
590 }
591
592 // use currency code as symbol of last resort
593 return currencyCode;
594 }
595
596 /**
597 * Returns the ISO 4217 currency code of this currency.
598 *
599 * @return the ISO 4217 currency code of this currency
600 */
601 public String toString() {
602 return currencyCode;
603 }
604
605 /**
606 * Resolves instances being deserialized to a single instance per currency.
607 */
608 private Object readResolve() {
609 return getInstance(currencyCode);
610 }
611
612 /**
613 * Gets the main table entry for the country whose country code consists
614 * of char1 and char2.
615 */
616 private static int getMainTableEntry(char char1, char char2) {
617 if (char1 < 'A' || char1 > 'Z' || char2 < 'A' || char2 > 'Z') {
618 throw new IllegalArgumentException();
619 }
620 return mainTable[(char1 - 'A') * A_TO_Z + (char2 - 'A')];
621 }
622
623 /**
624 * Sets the main table entry for the country whose country code consists
625 * of char1 and char2.
626 */
627 private static void setMainTableEntry(char char1, char char2,
628 int entry) {
629 if (char1 < 'A' || char1 > 'Z' || char2 < 'A' || char2 > 'Z') {
630 throw new IllegalArgumentException();
631 }
632 mainTable[(char1 - 'A') * A_TO_Z + (char2 - 'A')] = entry;
633 }
634
635 /**
636 * Obtains a localized currency names from a CurrencyNameProvider
637 * implementation.
638 */
639 private static class CurrencyNameGetter
640 implements
641 LocaleServiceProviderPool.LocalizedObjectGetter<CurrencyNameProvider, String> {
642 private static final CurrencyNameGetter INSTANCE = new CurrencyNameGetter();
643
644 public String getObject(
645 CurrencyNameProvider currencyNameProvider,
646 Locale locale, String key, Object... params) {
647 assert params.length == 1;
648 int type = (Integer) params[0];
649
650 switch (type) {
651 case SYMBOL:
652 return currencyNameProvider.getSymbol(key, locale);
653 case DISPLAYNAME:
654 return currencyNameProvider.getDisplayName(key, locale);
655 default:
656 assert false; // shouldn't happen
657 }
658
659 return null;
660 }
661 }
662
663 private static int[] readIntArray(DataInputStream dis, int count)
664 throws IOException {
665 int[] ret = new int[count];
666 for (int i = 0; i < count; i++) {
667 ret[i] = dis.readInt();
668 }
669
670 return ret;
671 }
672
673 private static long[] readLongArray(DataInputStream dis, int count)
674 throws IOException {
675 long[] ret = new long[count];
676 for (int i = 0; i < count; i++) {
677 ret[i] = dis.readLong();
678 }
679
680 return ret;
681 }
682
683 private static String[] readStringArray(DataInputStream dis,
684 int count) throws IOException {
685 String[] ret = new String[count];
686 for (int i = 0; i < count; i++) {
687 ret[i] = dis.readUTF();
688 }
689
690 return ret;
691 }
692
693 /**
694 * Replaces currency data found in the currencydata.properties file
695 *
696 * @param pattern regex pattern for the properties
697 * @param ctry country code
698 * @param data currency data. This is a comma separated string that
699 * consists of "three-letter alphabet code", "three-digit numeric code",
700 * and "one-digit (0,1,2, or 3) default fraction digit".
701 * For example, "JPZ,392,0".
702 * @throws
703 */
704 private static void replaceCurrencyData(Pattern pattern,
705 String ctry, String curdata) {
706
707 if (ctry.length() != 2) {
708 // ignore invalid country code
709 String message = new StringBuilder().append(
710 "The entry in currency.properties for ").append(
711 ctry).append(
712 " is ignored because of the invalid country code.")
713 .toString();
714 log(Level.INFO, message, null);
715 return;
716 }
717
718 Matcher m = pattern.matcher(curdata);
719 if (!m.find()) {
720 // format is not recognized. ignore the data
721 String message = new StringBuilder()
722 .append("The entry in currency.properties for ")
723 .append(ctry)
724 .append(
725 " is ignored because the value format is not recognized.")
726 .toString();
727 log(Level.INFO, message, null);
728 return;
729 }
730
731 String code = m.group(1);
732 int numeric = Integer.parseInt(m.group(2));
733 int fraction = Integer.parseInt(m.group(3));
734 int entry = numeric << NUMERIC_CODE_SHIFT;
735
736 int index;
737 for (index = 0; index < scOldCurrencies.length; index++) {
738 if (scOldCurrencies[index].equals(code)) {
739 break;
740 }
741 }
742
743 if (index == scOldCurrencies.length) {
744 // simple case
745 entry |= (fraction << SIMPLE_CASE_COUNTRY_DEFAULT_DIGITS_SHIFT)
746 | (code.charAt(2) - 'A');
747 } else {
748 // special case
749 entry |= SPECIAL_CASE_COUNTRY_MASK
750 | (index + SPECIAL_CASE_COUNTRY_INDEX_DELTA);
751 }
752 setMainTableEntry(ctry.charAt(0), ctry.charAt(1), entry);
753 }
754
755 private static void log(Level level, String message, Throwable t) {
756 Logger logger = Logger.getLogger("java.util.Currency");
757 if (logger.isLoggable(level)) {
758 if (t != null) {
759 logger.log(level, message, t);
760 } else {
761 logger.log(level, message);
762 }
763 }
764 }
765 }
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